Bench work in wood; a course of study and practice designed for the use of schools and colleges (1888)
Goss, William Freeman Myrick, 1878- · Boston : Ginn · leaf 71
The ratchet-brace is useful in boring holes near walls, or incorners where it is impossible to turn a common brace. The size of any brace is indicated by its swing, that is,by the diameter of the circle described by £, Fig. 119. Thebetter class are nickel-plated, and are thereby prevented… … the ratchet-brace. The bit is inserted at A, and a commonbrace is applied at C. The mechanical arrangement of theparts is such, that, when the brace turns the spindle C, the partA which holds the bit is also turned, notwithstanding the in-clination of one part to the other.1 Compared with the…
Woodwork (Manual training)
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